Boys' Love Novels What a waste! Kadokawa Ruby Library

Product description ※Please note that product information is not in full comprehensive meaning because of the machine translation.

Hyuga was shocked when her older sister got engaged to her first love, Keigo, in exchange for a huge amount of debt.
However, her older sister suddenly disappeared, and Hyuga decided to stay with Keigo as Masao.
However, Keigo looks like a gentle prince, but he is a profligate tyrant, and his character is hopelessly different from Hyuga, who is extremely frugal.
One day, while they were engaged in a battle that never yielded to each other, Hyuga's first love was found to be Keigo, and he was tricked by her?
A love battle in which a tyrant and a pure boy live together (?).